import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'list 学习',
        home: Scaffold(
          appBar: AppBar(title: Text('aaa')),
          body: Center(
            child: (Column(
              crossAxisAlignment: CrossAxisAlignment.start, //侧轴对齐方式
              mainAxisAlignment: MainAxisAlignment.center,  //主轴对齐方式
              children: <Widget>[
                Text('aaa'),
                Text('bbasdaaaaaaaaaaaaaaaaaaaaaaaaaab'),
                Text('ccc'),
              ],
            )),
          ),
        ));
  }
}
